Kudi dai yana nufin kowane irin abu da ake amfani dashi a wajen cinikayya, musamman waɗanda ke kaiwa da dawowa, kamar yadda Takardun banki ko kwandala musamman kudin da akeamfani dasu a cikin kasa. Akwai hanyoyin da dama da ake ake samun su a duniya ,domin dogaro da kai ta hanyar saida abu ko kuma ta hanyar sa mutum wani aiki a biya shi lada, kodai ta hanyar yimasa kyauta ko ya roka a wajen wani.